RESUMO
Geographic Tongue is a benign disorder involving the dorsal surface of the tongue characterized by depapillated areas with leading and folded edges in yellowish or grayish white color and sometimes with unclear borders. Many studies have reported a relationship between such condition and different risk factors. This study aimed to investigate the prevalence rate and the risk factors of geographic tongue in the patients referring to the Department of Oral Medicine of Zahedan Dental School, in 2012. Using Poisson regression model, 2000 patients referred to the Department were selected for this cross-sectional study. Data collection method included an investigation into the medical history as well as doing intraoral examinations. Using SPSS 17 software and Chi-square statistical test, the collected data were analyzed. Among the 2000 patients selected, 7.8% [156 persons] suffered from geographic tongue. The results of our study show that there is a significant relationship between the occurrence of geographic tongue and a history of allergy and fissured tongue [P<0.001]. There was no significant statistical relationship between the occurrence of geographic tongue and gender, smoking and medication. The geographic tongue is more frequently in the patients suffering from atopy or allergy as well as the patients with fissured tongue
RESUMO
Stainless steel crowns [SSCs] are widely used in restoring severely damaged primary molar teeth. Since these crowns do not adapt ideally to tooth substance, they may lead to some changes in surrounding gingiva. This clinical study was performed to evaluate the effect of stainless steel crowns placed on primary molars on gingival structures. In this retrospective study, 117 crowns in eighty four 4-11 year old children attended to pediatric department of Zahedan dental school were evaluated. Convenience sampling method was done. Some clinical factors such as gingival index, tooth type, state of being either right or left molar, or upper or lower molar, time elapsed after cementation, crown marginal adaptation, excessive cementation around the margin of crown and the oral hygiene level were examined. Kruskal-Wallis and Mann-Whitney tests were used for data analysis through SPSS 15 software [P<0.05]. In our study only 11.1% of the evaluated crowns demonstrated clinically healthy gingival, and there was a significant correlation between upper and lower molar, crowns marginal adaptation and oral hygiene level with gingival index [P<0.05], while gingival index was not significantly affected by tooth type, tooth side, time elapsed after cementation and presence of excessive cement around the margin of crown and sex [P>0.05]. Stainless steel crowns had no harmful effect on the gingival provided performing standard preparation procedures especially in upper molars and stablishing proper marginal adaptation and good oral hygiene level